Singer HD6360 Instruction Manual page 6

SERVICING OF DOUBLE INSULATED PRODUCTS
In a double-insulated product, two systems of insulation are provided instead of grounding. No
ground means is provided on a double-insulated product, nor should a means for grounding be
added to the product. Servicing of a double-insulated product requires extreme care and
knowledge of the system and should be done only by qualified service personnel.
Replacement parts for a double-insulated product must be identical to those parts in the
product. A double-insulated product is marked with the words "DOUBLE INSULATION" or
"DOUBLE INSULATED".
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